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dockerfiles/tmail/Dockerfile
Pratik raj b113da5d19 chore: Use --no-cache-dir flag to pip in Dockerfiles, to save space
Using "--no-cache-dir" flag in pip install ,make sure dowloaded packages
by pip don't cached on system . This is a best practise which make sure
to fetch ftom repo instead of using local cached one . Further , in case
of Docker Containers , by restricing caching , we can reduce image size.
In term of stats , it depends upon the number of python packages
multiplied by their respective size . e.g for heavy packages with a lot
of dependencies it reduce a lot by don't caching pip packages.

Further , more detail information can be found at

https://medium.com/sciforce/strategies-of-docker-images-optimization-2ca9cc5719b6

Signed-off-by: Pratik Raj <rajpratik71@gmail.com>
2021-07-02 01:02:49 +05:30

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Docker

#
# Dockerfile for tmail
#
FROM alpine
MAINTAINER kev <noreply@easypi.pro>
RUN apk add --update build-base \
python \
python-dev \
openssl \
&& wget -O- https://bootstrap.pypa.io/get-pip.py | python \
&& pip install --no-cache-dir twisted \
&& apk del --purge build-base \
python-dev \
openssl \
&& rm -rf /var/cache/apk/*
ENV MAIL_NAME easypi.info
ENV MAIL_PATH /var/mail
ENV MAIL_USER admin
ENV MAIL_PASS admin
ENV MAIL_OPTS=
VOLUME /var/mail
EXPOSE 25 110
CMD twistd -n mail --smtp=tcp:25 \
--pop3=tcp:110 \
--maildirdbmdomain=$MAIL_NAME=$MAIL_PATH \
--user=$MAIL_USER=$MAIL_PASS \
--bounce-to-postmaster \
$MAIL_OPTS